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参数资料
| 型号： | MAX16807AUI+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WT/RGB BCKLT 28TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 恒定电流： | 是 |
| 拓扑： | 开路漏极，PWM，降压（降压），SEPIC，升压（升压） |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 20kHz ~ 1MHz |
| 电源电压： | 8 V ~ 26.5 V |
| 输出电压： | 36V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1424 (CN2011-ZH PDF) |
Integrated 8-Channel LED Driver with
Switch-Mode Boost and SEPIC Controller
LED Driver
4-Wire Interface
The MAX16807 also operates in a stand-alone mode
(see the Typical Operating Circuits). For use with a
microcontroller, the MAX16807 features a 4-wire serial
interface using DIN, CLK, LE, OE inputs and DOUT as
a data output. This interface is used to write the LED
channels’ data to the MAX16807. The serial-interface
data word length is 8 bits, D0–D7. See Figure 3.
The functions of the five interface pins are as follows:
DIN is the serial-data input, and must be stable when it
is sampled on the rising edge of CLK. Data is shifted in
CLK. Data at DIN propagates through the shift register
and appears at DOUT eight clock cycles later. Table 1
shows the 4-wire serial-interface truth table.
Selecting External Component
R SET to Set LED Output Current
The MAX16807 uses an external resistor, R SET , to set
the LED current for outputs OUT0–OUT7. The minimum
allowed value of R SET is 330 ? , which sets the output
currents to 55mA. The maximum allowed value of R SET
is 5k ? (I OUT_ = 3.6mA) and maximum allowed capaci-
tance at SET is 100pF.
Use the following formula to set the output current:
MSB first. This means that data bit D7 is clocked in first,
followed by 7 more data bits, finishing with the LSB, D0.
CLK is the serial-clock input that shifts data at DIN into
R SET =
18, 000
I OUT _
the MAX16807’s 8-bit shift register on its rising edge.
LE is the latch enable input of the MAX16807 that trans-
fers data from the 8-bit shift register to its 8-bit output
latch (transparent latch). The data is latched on the
falling edge of LE (Figure 4). The fourth input ( OE ) pro-
vides output-enable control of the output drivers. When
OE is driven high, the outputs (OUT0–OUT7) are forced
to high impedance without altering the contents of the
output latches. Driving OE low enables the outputs to
follow the state of the output latches. OE is indepen-
dent of the operation of the serial interface operation.
Data can be shifted into the serial-interface shift regis-
ter and latched, regardless of the state of OE . DOUT is
the serial-data output that shifts data out from the
MAX16807’s 8-bit shift register on the rising edge of
Table 1. 4-Wire Serial-Interface Truth Table
where I OUT_ is the desired output current in milliamps
and the value for R SET is in ohms.
Overtemperature Cutoff
The MAX16807 contains an internal temperature sensor
that turns off all outputs when the die temperature
exceeds +165°C. The outputs are enabled again when
the die temperature drops below +140°C. Register con-
tents are not affected, so when a driver is overdissipat-
ing, the external symptom is the load LEDs cycling on
and off as the driver repeatedly overheats and cools,
alternately turning itself off and then back on again.
DATA
SERIAL CLOCK SHIFT REGISTER CONTENTS LOAD
INPUT INPUT
LATCH CONTENTS
BLANKING
INPUT
OUTPUT CONTENTS
CURRENT AT OUT_
INPUT
DIN
H
L
CLK D0 D1 D2 … Dn-1 Dn LE D0 D1 D2 … Dn-1 Dn
H
R0 R1 … Rn-2 Rn-1
L
R0 R1 … Rn-2 Rn-1
OE
D0 D1 D2 … Dn-1 Dn
X
R0
R1 R2 … Rn-1
Rn
X
X
X
…
X
X
L
R0 R1 R2
… Rn-1 Rn
P0
P1
P2 … Pn-1
Pn
H
P0
X
P1
X
P2
X
… Pn-1 Pn
…
X
X
L
H
P0
L
P1 P2
L
L
…
…
Pn-1
L
Pn
L
L = Low Logic Level
H = High Logic Level
X = Don’t Care
P = Present State (Shift Register)
R = Previous State (Latched)
______________________________________________________________________________________
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16807AUI+ | 功能描述:LED照明驱动器 8Ch w/Switch-Mode Boost & SEPIC Ctlr RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX16807AUI+T | 功能描述:LED照明驱动器 8Ch w/Switch-Mode Boost & SEPIC Ctlr RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX16807EVKIT+ | 功能描述:LED 照明开发工具 MAX16807 Eval Kit RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX16808AUI+ | 制造商:Maxim Integrated Products 功能描述:LED DRVR 3V TO 5.5V 28TSSOP EP - Rail/Tube |
| MAX16808AUI+T | 制造商:Maxim Integrated Products 功能描述:LED DRVR 3V TO 5.5V 28TSSOP EP - Tape and Reel |
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